384 Memoirs on the Coleoptera 



irregular within and are non-decussate. Quadripustulatus is re- 

 corded from Central America by Mr. Champion, but, in view of 

 the considerable number of Amazonian species now before me, I 

 am quite certain that it will prove to be specifically distinct ; it is, 

 however, interesting to note that the genus extends to the north- 

 ward beyond the Amazonian region, for there is no evidence now 

 at hand indicating a southern extension, excepting the very aberrant 

 conicicollis described above. 



Conoproctus Lac. 



The body here is very much as in the preceding genus in form, 

 color and sculpture, the four oblique red elytral spots almost 

 identical, but in many other respects it is quite different. The 

 beak in the male is similarly very long, but is feebly arcuate, smooth 

 beneath and without trace of the inferior fringe of Pseiidomadarus, 

 and the antennae are as near as possible to the extreme apex; it is 

 similarly separated from the head by a very feeble transverse 

 impression and the mandibles are non-decussate. In the female, 

 the beak is even relatively shorter and distally more slender than 

 in the preceding genus, and similarly, it is evenly and rather strongly 

 arcuate. Antennae very long and slender, the scape (c 71 ) longer 

 than in any other Barid genus, extending nearly through the entire 

 length of the beak, the first funicular joint as long as the apical 

 width of the prothorax and three-sevenths of the entire shaft, the 

 first three joints diminishing rapidly in length, 4, 5 and 7 a very 

 little longer than wide, 6 a little shorter, the club very moderate, 

 narrowly oval, gradually pointed and as long as the four preceding 

 joints, or ( 9 ) much shorter, medial, the scape as long as the apical 

 thoracic width, only the first two funicular joints elongate, the 

 first as long as the next four, 4-7 wider than long, the club a little 

 more oval. The presternum is almost exactly as in the preceding 

 genus, the coxae separated, however, by about their own width or 

 less, the prothorax throughout, scutellum and elytra nearly similar, 

 except that the elytral apex is merely remotely striate, not at all 

 exarate; the pygidium is very different, being convex, subhorizontal, 

 long, angulate and minutely, sparsely punctate (o 71 ) or slightly 

 oblique, wider than long, semicircular, flatter and coarsely, deeply 

 and densely punctate ( 9 ). The legs are similarly long and rather 

 slender, simple and with nearly similar tarsi, the third joint but 

 slightly dilated; the male anterior legs are much more notably 

 longer than those of the female than they are in Pseiidomadarus, 

 where the difference is barely observable. The single species in my 

 collection is the following: 



Conoproctus fluvialis n. sp. — Form very elongate-suboval, convex, smooth, 

 faintly alutaceous, deep black, the elytra each with two oblique red spots; beak 



